UTC 8227, Schematy ideowe w PDF [ Pobierz całość w formacie PDF ]
UTC8227
LINEAR INTEGRATED CIRCUIT
LOW FREQUENCY POWER
AMPLIFIER
The UTC8227 is the audio power amplifier with built-in
two channel developed for portable radio cassette tape
recorder with power ON/OFF switch.
FEATURES
*Wide operating supply voltage: Vcc=5~12V
*Low quiescent supply current
(Icc=21mA,typical,at Vcc=9V ,Vi=0)
*Output power
Po=2.50W/CH at Vcc=9V,R
L
=4ohm ,f=1kHz,Thd=10%
*Soft Clip
*Built-in Thermal shut-down protection circuit
*Stand-by Switch
HDIP-12
TEST CIRCUIT
SW1
Vcc2
Vcc1
1
12
Input 1
3
Boot
stra
p 1
6
1000
µ
F
Output 1
2
NF1
45
5
RL
120
30k
Ripple
9
Boot
stra
p 2
10
7
1000µF
Output 2
Input 2
11
NF2
45
8
RL
120
30k
TAB
4
Pre
GND
Power
GND
YOUWANG ELECTRONICS CO.LTD
1
DESCRIPTION
UTC8227
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
(Ta=25
°
C)
Characteristic
Symbol
Value
Unit
Supply Voltage
Vcc
20
V
Output Current
Io
2.5
A
Power Dissipation(note)
Pd
4
W
Operating Temperature
Topr
-20 ~
+75
°
C
Storage Temperature
Tstg
-55 ~ +150
°
C
Note: Value for mounting on PC board
ELECTRICAL CHARACTERISTICS
(Ta=25
C,Vcc=9V,RL=4
W
,Rg=600
W
,f=1kHz,unless otherwise specified)
Characteristic
Symbol
Test Conditions Min Typ Max Units
Quiescent current
Icc
Vi=0
21
45
mA
THD=10%,RL=4
W
2.0
2.5
W
Output Power
Po
THD=10%,RL=3
W
3.0
W
Total Harmonic Distortion
THD
Po=0.4W/CH
0.2
1.0
%
Voltage Gain
Gv1
R
f
=120
W
,Vout=0.775Vrms
43
45
47
dB
Gv2
R
f
=0,Vout=0.775Vrms
56.5
Input Impedance
Rin
30
W
Output Noise Voltage
Vno
Rg=10k
W
,BW=20Hz~20kHz
0.3
1.0 mVrms
Ripple Rejection Ratio
R.R
Rg=600
W
fripple=100Hz
52
dB
Cross Talk
C.T
Rg=600
W
,Vout=0, f=1kHz
50
dB
Input Offset Voltage
V7,8
30
60
mV
Standby Current
Sw1:OFF
1
m
A
YOUWANG ELECTRONICS CO.LTD
2
°
UTC8227
LINEAR INTEGRATED CIRCUIT
TYPICAL PERFORMANCE CHARACTERISTICS
ICCQ, V2,V10 vs. VCC1
THD vs Output Power
Cross Talk vs. Frequency
15
15
10
Vcc1=12V
Vin=0
Ta=25
6V
Vcc=9V
R
L
=4
12
I
CCQ
12
Vcc2=5V
9V
0
R
NF
=120
Vcc1=9V
RL=4
f=1kHz
RNF=120
Vout=0dBm
9
9
-20
1
Ta=25
6
6
-40
3
V
10
,V
2,
3
-60
0
0
0.1
-80
0
3
6
9
12
15
0.01
0.1
1
10
10
1
10
2
10
3
10
4
10
5
Supply Voltage , Vcc2 (V)
Output Power (W)
Frequency ( Hz)
ICCQ, DC Vout vs. Supply Voltage
Voltage Gain vs. Frequency
Ripple Rejection vs. frequency
100
20
Vin=0
80
16
80
Vcc=9V
R
L
=4
0
Vcc=9V
R
L
=4
R
NF
=120
R
NF
=120
60
12
60
-20
Rg=620
Vout
40
8
40
-40
20
I
CCQ
4
20
-60
0
0
0
-80
0
5
10
15
20
25
10
1
10
2
10
3
10
4
10
5
10
1
10
2
10
3
10
4
10
5
Supply Voltage , Vcc2 (V)
Frequency ( Hz)
Frequency ( Hz)
APPLICATION INFORMATION
1.Input Voltage
When the excessive signal is input, turning-up is produced in the clip waveform. The turning-up point is
Vin=300mVrms(Typical) at Vcc=9V,RL=4
W
f=1kHz. Enough care must be taken for this phenomenon.
2.Power ON/OFF
There is power ON/OFF switch at pin 1. However output power is changed by pin 1 supply voltage when
pin1 supply voltage is not same pin 12 supply voltage, after referring to attached date, select pin 1 supply voltage.
3.Voltage Gain
The voltage gain can be changed by the external negative feedback resistor. When Rf=0, the Gain is equal
to 56.5dB.When Rf=120
W
the Gain is equal to 45dB.
YOUWANG ELECTRONICS CO.LTD
3
Rg=620
This datasheet has been downloaded from:
Datasheets for electronic components.
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